Patent GB-442260-A (GB)
Title: Improvements in or relating to split-foot knitting machines
IPC: D04B9/46
Filed: 1935-06-01
Abstract: 442,260. Knitting-machines. HEMPHILL CO., Central Falls, Rhode Island, U.S.A.- (Assignees of Lawson, R. H.; .55, Cooke Street, Pawtucket, Rhode Island, U.S.A.) June 1, 1935, No. 15987. Convention date, Aug. 23, 1934. [Class 74 (ii)] Circular machines ; sinkers.-In a machine for knitting split foot hosiery and having a main cam set 121, 122, 123, 134 for knitting the welt 1, high splice 3, sole 6, and heel 7 on short butt needles 206 and an auxiliary cam set 183, 184, 185, 186 for knitting the leg 2 and instep 4 on long butt needles 207 supplemented at times by more or less of the short butt needles as determined by jacks having long and short butts 208, 209 and selecting cams, tension on the loops drawn at one cam set and tending to be drawn again at the other cam set is relieved by the use of sinkers 369 provided with depressions 370 at the end of the drawing edge 371 or by the use of a cam 187 or 375 with lifts 373, 374, 377, 378 which elevate the needles slightly immediately after the stitch has been drawn by the cam 183 or 184. The main cam block 42 can be retracted by a lever 116, rod 118, and cam against the action of a spring 119 when the needles are to be levelled for transfer purposes &c. One knitting cam 121 is retracted during round-and-round knitting by a link 125, lever 127, and cam on the main cam shaft 39, a finger 135 on the stem of the cam 121 causing the narrowing pick 133 to be swung out of action at the same time. The upper and lower instep cams 138, 139 have stems 142, 143 sliding in radial grooves 140, 141 in a block 137 secured along with the cam block 42 to a plate 43 which is raised and lowered for fashioning purposes by cams on the drum 44. The cam block 45 is moved vertically by a lever 51 and cams 54 on a drum 55 for fashioning purposes also. The lower instep cam 139 is normally held by a spring 146 in position to engage the long butt needles but is drawn out of operation by a cam rod 151 which is connected by a lever 176 &c. with a clutch shifter 41 so as to be actuated when the machine changes from rotary to reciprooatory knitting. The upper instep cam 138 is moved to and from the cylinder 29 by a lever 157 &c. and a pattern chain 168<1>. The raise cam 187 is preferably in two parts overlapping each other. The widening picks 188, 189 carried by the auxiliary cam block 45 are operated by two levers 193, 194 and a common push rod 195. As shown, there are six long butt jacks 208 and three short butt jacks 209, Fig. 23, under the extreme short butt needles 206, Fig. 22. The jacks are acted on by cams 210, 211, 212, 213, 214, and 215. The cams 211 and 215 are fixed cams. The suture cam 210 can be moved to engage all the jacks, the long butted jacks, or none of them by means of lever 224, linkwork and cams on the stop motion cam drum. The high splice and double sole cams 212, 214 are moved radially outwards by links 245, 257 and a shaft 246, and inwardly by springs. In their mid positions, i.e. when they are to engage the long butt jacks only, they are accurately positioned by adjustable stop screws 270, 272 which come against distance pieces 264, 265, moved into and out of position by a lever 277, rod 282, and cam 284. The shaft 246 is operated by a lever 294, a rod 302, and cams on the drum 112<1> ; it is also operated by levers 307, 311, 324, &c., and cams 317, 318 on the " 104 " shaft 94. The lever 324 is fixed on a shaft 321 which is slid endwise by a cam and lever 337 to move the lever 324 out of the path of the cams 317, 318, into the path of the said cams, or on to the concentric part of the disc 316. The auxiliary cam block can be moved into and out of operative position by means of a rod 344, shaft 340, and lever 343, and the centre auxiliary cam can be moved independently by a rod 347, shaft 341, and lever 346. This same rod 347 is also connected to lever 348 the upper cam end 350 of which controls the auxiliary yarn guide 352. The lever 348, also positions the sinker operating cam 366. U.S.A. Specification 1,673,764 is referred to.